
<!Doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>邀请</title>
</head>
<body>

<form action="/" method="post">
extra: <input type="text" name="extra" /><br />
<input type="submit" value="提交"/>
</form>
</body>

</html>
